It would be very comfortable to have one more option in energy saving module, beside the existent "when laptop lid is closed" have a "when you open the laptop lid" option with at least two choices "do nothing" and "resume laptop". I suppose easy to do as I did in my laptop following this: https://wiki.archlinux.org/index.php/laptop#Modify_wake_events and it could be useful in at least this two cases: -I leave sometimes the laptop closed, my son open it and leave opened, so the laptop resume and it remains on for hours running out the battery, -I usually put some paper sheet used to remember to do something between the lid and the keyboard, when I want to read this paper sheet, I have to open the lid, the laptop resume and I have to login and to suspend again. And also it would complete the cases considered in energy saving module.
I don't see how we can influence this, it's the firmware of the laptop waking it back up, isn't it?
I guess one could somehow mess around with /proc/acpi/wakeup
I don't know about the firmware of closing and opening the laptop lid, but, following the instruction in the site: creating this file: /etc/tmpfiles.d/disable-lid-wakeup.conf with into this: w /proc/acpi/wakeup - - - - LID has been so simple that I though it was simple as well to introduce an "open lid" option beside the "close lid" one. Ciao an manythanks :-)